DAP Concrete Crack Filler is a one-of-a-kind, water activated dry powder that creates a seamless repair in one pass. Ready to use; no shaking or mixing required. Once applied and dampened, it hardens to permanently fill and repair cracks. Withstands weather elements, resists UV fading, cracking and shrinking. DAP Crack filler is a low dust, easy to pour formula that effectively fills horizontal cracks for fast and easy repairs. To use: prep surface, fill crack, level and mist. Use as is. DO NOT mix with other products. Exterior/Interior use.